Abstract
Eight Finncattle cows were used in two replicated 4x4 Latin squares with 21 -day periods to study the effects of replacing rapeseed cake with linseed cake in proportions of 0, 1/3, 2/3 and 1 (on air dry basis), the total amount of supplement being 1.5 kg/day (on air dry basis). The basal diet consisted of silage fed ad libitum and a 4.5 kg/day (on air dry basis) barley:oats (1:1) mixture. The experimental diets had no effect on feed intake. Effective protein degrability (EPD) determined by the nylon bag method was higher for linseed cake than for rapeseed cake. Milk production decreased linearly (P
Highlights
There was a marked difference in the protein values of the two supplements despite the small differences in crude protein (CP) content
When cereal-based concentrates have been replaced, by weight, with rapeseed feeds in Finnish feeding experiments, the production responses have, on average, been 1.07 kg milk or 39.9 g milk protein per kg dry matter (DM) replaced (Ahvenjärvi et al 1995), Here, the response to replacement of linseed cake (LC) with rapeseed cake (RC) resulted in 1.03 kg milk, 0.81 kg energy corrected milk (ECM) and 50 g milk protein output per day per kg DM replaced
The results of the present experiment suggest that linseed cake is less suitable than rapeseed cake for dairy cow feeding
Summary
M. et al Linseed cake in a grass silage-based dietfor cows cally innovative developments in, for example, hard board production (van Kempen and Jansman 1994). Once the oil has been removed, linseed meal or cake can be used as animal feed. Rapeseed products are the most important protein supplements used in dairy cow feeding in Finland, and their effects on milk production have been extensively studied In a historical perspective, linseed-based feeds have been highly appreciated, but in more recent times a range of negative factors such as antinutritional compounds and the poor amino acid composition oflinseed products have been reported (Olsson et al 1988, van Kempen and Jansman 1994)
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